Edge tool



F 1950 R. A. J. WILSON 2,497,482

EDGE TOOL Filed Jan. 9, 1946 23 4 0 v rlvelltor Rubye Anne JaryeauxWilson Patented Feb. 14, 1950 urns-o v so 2,497,482

Bubye AnnqJgrveaux Wilson, New Qfleans; La. 'Margaret -Wilson J olgnsonfladministrat'rix -of said ltubye Anne J arveaux ..Wilson,deceased .A1mati9 .-Ianear 46 ,;..S.r1a .Nwfiiifid My invention relates toimprovements inedge tools. esp cially knives and thelike.

,Thepri rrary object of the invention i toinexpensively equip a cuttingblade with a removable and replaceable, rigid, bevel-edge cutting memberinterlocking with the blade to provide rigidity, and which may be formedof a different material than the blade better adapted to retain itsedge, and is adapted for resharpening so as to constitute a replacementpart.

Other and subordinate objects also comprehended by my invention,together with the precise nature of my improvements, and the manifoldadvantages thereof, will be readily understood when the succeedingdescription and claims are read with reference to the drawingaccompanying and forming part of this specification.

In said drawing Figure l is a view in perspective illustrating myinvention in a preferred embodiment thereof,

Figure 2 is a view in end elevation drawn to an enlarged scale,

Figure 3 is a fragmentary view in perspective of a modified embodimentof the cutting member,

Figure 4 is a view in end elevation of another modified embodiment ofthe cutting member, and

Figure 5 is a view in side elevation of still another modifiedembodiment of the invention.

Referring to the drawing by numerals, and first to Figures 1 and 2, myinvention has been shown therein by way of exemplification, ascomprising a knife, or other tool, blade I forming a holder for a bevelcutting edge member '2. The knife blade I is of bevel form with sides 3converging to a blunt leading edge 4.

The cutting edge member 2 is likewise of bevel form, coextensive inlength, substantially, with said blade I and narrower than said blade,and is provided with an outer cutting edge portion 5 bevelled inconformity with the angle of con- 'vergence of the sides 3 of said bladeI and which has a root thickness corresponding to the thickness of saidblunt edge 4 for a purpose presently seen. At its opposite edge 6 thecutting edge member 2 is fiat, and between said edges 5, 6 is providedwith'sides l which converge to the root of the cutting edge portion 5 ata lesser angle than the sides 3 of said blade I. The sides 1 areprovided with longitudinally extending fiutes, or ribs, 8, preferably ofsquare form in cross-section.

A longitudinal recess 9 is provided in the knife blade I in the medianplane thereof and extending from end to end of the blade, said recessextending into said blade from the leading edge 4 Claims. (01.: 30- 349a dep h sq e penclina the width. 9 the side of said. membe betweent evrcz tp cuttin ed er tio 5 en i fi e ed 1 19 ai memb r The sides'of, therecess}; are provided,-With,longi tudinal flutes, or ribs, I ll adaptedto interfit, with the flutes, or ribs, 8 of said member 2, and themember 2 is slidably fitted in said recess 9 for removal endwise but isinterlocked therein against removal laterally by the interfittingflutes, or ribs, 8, l0.

Fasteners may be provided at each end of the cutting blade I forpreventing endwise creeping of the cutting edge member 2 in the recess9. As shown in Figure 2, said fasteners may take the form of fiat, metalfingers, as at H, countersunk in the end of the blade I and secured tosaid end by screws [2 with one end portion overlapping the correspondingend of said member 2 and provided with a nub I-3 bearing against saidend of said member.

As shown in Figure 3, the cutting edge portion l4 of the cutting edgemember [5 may be sawtoothed. Otherwise, said member I5 is identical withthe described member 2.

As will now be seen, my invention provides a cutting edge member in abevel-sided holder, which may be a knife or other tool blade, saidmember having a cutting edge portion the sides of which are coplanarwith the bevel sides of the holder, and which portion extends out of theholder. The cutting edge member is removable easily for replacement,when dull, by a new one, or for sharpening and subsequent replacement,and may be formed of a harder material than that of the holder adaptingthe same to hold a cutting edge.

In the modified embodiment of my invention shown in Figure 4, thecutting edge member l6 has the form of a half section of the member 2longitudinally split therefrom so that the member I6 is formed with acutting edge portion bevelled on one side only and designated l1, andwith flutes, or ribs, It! on the corresponding side of the member only.As will be understood, this modified cutting edge member is designed tobe fitted in a blade, not shown, having a correspondingly shaped andconstructed recess therein.

In the modified embodiment of the invention shown in Figure 5, a cuttingedge member l9, similar to the member 2, is provided in one blade 20 ofa pair of shears 2|, in the same manner as in the first describedembodiment of the invention, with the following exceptions. A sidefastener lug 22 on the member I9 is secured by a screw 23 to said memberto fit in an aperture 24 3 in the blade '20 for preventing endwisecreeping of said member IS.

The foregoing will, it is believed, suffice to impart a clearunderstanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible of modificationwithout departing from the inventive concept, and right is hereinreserved to such modifications as fall within the scope of the appendedclaims. What I claim is:

1. A blade-like holder of elongated form and triangular shape incross-section with sides converging to a blunt edge and having alongitudinal recess extending therein from said blunt edge, and acutting edge member set into said recess and having a bevelled cuttingedge portion extending out of said recess provided with sides coplanarwith the sides of said holder, said recess and said member havinginterfitting fluted sides for preventing the member from displacementout of said recess in the direction of said edge, said interfittingsides converging from the bottom of said recess to said blunt edge at alesser angle than the sides of said holder and the sides of saidbevelled cutting edge portion.

2. A blade-like holder of elongated form and triangular shape incross-section with sides con verging to a blunt edge and having alongitudinal recess extending therein from said blunt edge, and acutting edge member set into said recess and having a bevelled cuttingedge portion ex tending out of said recess provided with sides coplanarwith the sides of said holder, and means on the holder confining saidmember in said recess against movement along the same compris ing flatfingers countersunk in the ends of said holder and cutting edge memberand detachably secured to said ends of said holder.

RUBYE ANNE JARV'EAUX WILSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 107,334 Carew Sept. 13, 18701,124,690 Barnett Jan. 12, 1915

